Bull Call Spread Strategy Explained

I. Definition:

A bull call spread options trading strategy refers to a strategy in the options trading market where a trader buys a call option at a lower strike price and sells a call option at a higher strike price.

II. Profit Method:

For the buyer, if operating according to this strategy, buying at a lower strike price and selling at a higher strike price can earn returns in the form of price spread. Of course, maximum returns are also limited by the higher strike price. Generally, traders will choose a long bull call spread options trading strategy when the market overall shows a bullish trend, but short-term volatility cannot be controlled. Therefore, traders tend to sell quickly while buying options to earn definite spread returns. If the trader's judgment of market direction is wrong, they can stop losses by reducing the option premium method.

As the counterparty to the buyer, the seller sells the same call option, resulting in relatively less option premium received. However, also in the case of misjudging the market, their losses will have an upper limit.

III, Trading Details:

Generally, this strategy can only be deployed in a bullish market scenario. Assuming buying 1 call option is leg 1, and selling 1 call option is leg 2, then:

Maximum loss is the net strategy price, maximum profit is capped. Additionally, it should be noted that as compensation for limiting profits, traders can participate in market trading at a lower cost. The income from selling the higher strike price option reduces the overall execution cost of the trading strategy.

Of course, the conditions for the above results to hold are as follows:

1) Number of legs = 2, i.e., this strategy has only 2 legs

• Leg 1 trading instrument ≠ Leg 2 trading instrument, i.e., both legs are call options, but with different strike prices

3) Leg 1 expiration date = Leg 2 expiration date, i.e., both legs have the same expiration date

4) Leg 1 quantity = Leg 2 quantity, i.e., both legs have the same quantity

• Leg 1 strike price ≠ Leg 2 strike price, i.e., the two legs have different strike prices

• Leg 1 trading direction ≠ Leg 2 trading direction, the two legs have different trading directions

7) Both legs have the same underlying assets

Tip 1: About Net Strategy Price

Long net strategy price = Leg 1 call option premium (seller quote) (low strike price) - Leg 2 call option premium (buyer quote) (high strike price)

Short net strategy price = Leg 1 call option premium (buyer quote) (low strike price) - Leg 2 call option premium (seller quote) (high strike price)

Tip 2: About Margin Rules

Long: No additional margin requirement, maximum loss is net option premium

Short: Maximum loss – Net option premium

Note: Net option premium = [high strike seller price] – [low strike buyer price] * contract multiplier * contract quantity – [short call option premium – long call option premium]

Tip 3: About Returns Curve Chart

IV. Specific Trading Example:

Leg 1: Buy 1 Bitcoin call option, expiration date November 21, strike price $60,000

Leg 2: Sell 1 Bitcoin call option, expiration date November 21, strike price $70,000

Price spread between higher and lower strike prices = $10,000

Assuming the specific operation case is as follows —

Leg 1 price: $2,000

Leg 2 price: $1,000

Trading net income: 2,000 – 1,000 = $1,000

Current Bitcoin price: $60,000

**Case 1: **Bitcoin price falls to $50,000, both options are out-of-the-money (OTM)

Leg 1 returns: Premium paid = -$2,000

Leg 2 returns: Premium received = $1,000

Total returns: $1,000 – $2,000 = -$1,000

**Case 2: **Bitcoin price rises and is between the two strike prices, assume $65,000

Leg 1 returns: Premium paid + (spot price – strike price) = -2,000 + (65,000 – 60,000) = $3,000

Leg 2 returns: Premium received = $1,000

Total returns: 3,000 + 1,000 = $4,000

**Case 3: **Bitcoin price rises above the higher strike price, assume $75,000

Leg 1 returns: Premium paid + (spot price – strike price) = -2,000 + (75,000 – 60,000) = $17,000

Leg 2 returns: Premium received – (spot price – strike price) = 1,000 – (75,000 – 70,000) = -$4,000

Total returns: 17,000 – 4,000 = $13,000

Disclaimer

This article may contain product-related content not applicable to your region. This article is intended to provide general information only and does not take responsibility for any factual errors or omissions herein. This article represents only the author's personal views and does not represent the views of OKX. This article is not intended to provide any of the following advice, including but not limited to: (i) investment advice or investment recommendations; (ii) offers or solicitations to buy, sell or hold digital assets; or (iii) financial, accounting, legal or tax advice. Holding digital assets (including stablecoins) involves high risk, may fluctuate significantly, and even become worthless. You should carefully consider whether trading or holding digital assets is suitable for you based on your financial situation. For questions about your specific situation, please consult your legal/tax/investment professional. The information appearing in this article (including market data and statistics, if any) is for general reference only. Although we have taken all reasonable precautions in preparing these data and charts, we assume no responsibility for any factual errors or omissions expressed herein. © 2025 OKX. This article may be reproduced or distributed in full, or excerpts of 100 words or less from this article may be used, provided such use is non-commercial. Any reproduction or distribution of the entire article must also prominently state: "This article © 2025 OKX, used with permission." Permitted excerpts must cite the article name and include attribution, e.g., "Article Name, [Author Name (if applicable)], © 2025 OKX". Some content may be generated or assisted by artificial intelligence (AI) tools. Derivative works or other uses of this article are not permitted.

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